OPERA observed a third neutrino tau

27 March 2013 – INFN – OPERA observed a third neutrino tau.

The OPERA international experiment at the INFN Gran Sasso Laboratory (Italy) has observed a third neutrino tau candidate from “flavour” oscillation. The “muon-type” neutrino produced at CERN in Geneva arrived at the Gran Sasso laboratory as a “tau” neutrino. An extremely rare event observed only twice before, in 2010 and in 2012.

The data analysis will be pursued for two more years searching for other tau neutrinos that could definitely prove this very rare phenomenon.

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